CN102762507A - Apparatus and methods for fusion drawing a glass ribbon - Google Patents
Apparatus and methods for fusion drawing a glass ribbon Download PDFInfo
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- CN102762507A CN102762507A CN2011800065443A CN201180006544A CN102762507A CN 102762507 A CN102762507 A CN 102762507A CN 2011800065443 A CN2011800065443 A CN 2011800065443A CN 201180006544 A CN201180006544 A CN 201180006544A CN 102762507 A CN102762507 A CN 102762507A
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- Prior art keywords
- guide device
- glass
- margin guide
- glass ribbon
- edge
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
- C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
- C03B17/067—Forming glass sheets combined with thermal conditioning of the sheets
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
- C03B17/068—Means for providing the drawing force, e.g. traction or draw rollers
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/0215—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the ribbon being in a substantially vertical plane
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/02—Forehearths, i.e. feeder channels
- C03B7/06—Means for thermal conditioning or controlling the temperature of the glass
Abstract
An apparatus for fusion drawing a glass ribbon includes a forming wedge with a pair of downwardly inclined forming surface portions converging along a downstream direction to form a root. The apparatus further includes an edge director intersecting with at least one of the pair of downwardly inclined forming surface portions, a heating device configured to heat an interface of the molten glass in contact with the edge director, and a cooling device configured to extract heat from a portion of the glass ribbon flowing off of the edge director. Methods are also provided for heating an interface of the molten glass in contact with the edge director and for extracting heat from a portion of the glass ribbon flowing off of the edge director.
Description
The benefit of priority that No. the 61/296240th, the U.S. Provisional Patent Application that the application requires to submit on January 19th, 2010.
Technical field
Present invention relates in general to the equipment and the method for fusion draw glass ribbon, and more particularly, relate to the equipment and the method for fusion draw glass ribbon with heating unit and refrigerating unit.
Background technology
Glass making system is generally used for forming the various glassy products such as the LCD sheet glass.Known to making melten glass be downward through the shaping voussoir and bringing the manufacturing sheet glass from the root drawn glass of shaping voussoir.The margin guide device is located at the opposed end place of shaping voussoir usually, to help to realize desired glass ribbon width and peripheral bead characteristic.
Summary of the invention
Below provide simplification general introduction of the present invention to be provided at the basic comprehension of some exemplified aspect of describing in the circumstantial letter.
In the illustrative aspects, the fusion downdraw method comprises makes melten glass mobile step on a pair of downward-sloping profiled surface part of shaping voussoir, and said downward-sloping profiled surface part is along restraining to form root along downstream direction.This method also comprise make melten glass with this margin guide device that at least one profiled surface in downward-sloping profiled surface part is partly intersected on the mobile step.This method comprises also that from the step of root drawing glassribbons wherein, the edge of glass ribbon is formed by the melten glass that flows down from the margin guide device.This method comprises that also the contact surface that contact with the margin guide device that uses heating unit to come heating and melting glass and use refrigerating unit come from the step of the part extract heat that flows down from the margin guide device of melten glass.
In another exemplified aspect, a kind of equipment of fusion draw glass ribbon comprises the shaping voussoir, and this shaping voussoir has a pair of downward-sloping profiled surface part, and this is restrained to form root along downstream direction the inclined surface part.This equipment also comprises the margin guide device, and this margin guide device partly intersects with at least one profiled surface that is somebody's turn to do in the downward-sloping profiled surface part.This equipment also comprises heating unit and refrigerating unit, and this heating unit is configured to the contact surface that contacts with the margin guide device of heating and melting glass, and this refrigerating unit is configured to the part extract heat that flows down from the margin guide device from glass ribbon.
First illustrative aspects of the present invention relates to the fusion draw method, may further comprise the steps: melten glass is flowed on a pair of downward-sloping profiled surface part of shaping voussoir, and said downward-sloping profiled surface part is along restraining along downstream direction to form root; Make melten glass with said a pair of downward-sloping profiled surface part in the margin guide device that partly intersects of at least one profiled surface on flow; From said root drawing glassribbons, wherein, the edge of glass ribbon is formed by the melten glass that flows down from the margin guide device; Use heating unit to come the contact surface that contacts with said margin guide device of heating and melting glass; And use refrigerating unit to come the part extract heat that flows down from said margin guide device from glass ribbon.
Among some embodiment of first aspect of the present invention, heating unit remains on the contact surface that contacts with the margin guide device of melten glass the liquidus temperature top of melten glass.
Among some embodiment of first aspect of the present invention, this method comprises the temperature at the melten glass of root downstream position is remained on the step below the sagging warpage temperature of melten glass.
Among some embodiment of first aspect of the present invention, refrigerating unit is preferentially from the edge extract heat below root of glass ribbon, makes the temperature at edge of glass ribbon reduce with the speed higher than the temperature inside of glass ribbon.
Among some embodiment of first aspect of the present invention, the ratio of specific heat that refrigerating unit is drawn from the edge below root of glass ribbon is provided to melten glass by heating unit the heat of the contact surface that contacts with the margin guide device is many.
Among some embodiment of first aspect of the present invention, this method also comprises the step that the cooled region with the heating region of heating unit and refrigerating unit shields.
Among some embodiment of first aspect of the present invention, through using the external heater of the outside operation of conductor on the edge of, heating unit keeps the contact surface that contacts with the margin guide device of melten glass.
Among some embodiment of first aspect of the present invention, through using the interior heater of conductor internal operation on the edge of, heating unit keeps the contact surface that contacts with the margin guide device of melten glass.
Among some embodiment of first aspect of the present invention, refrigerating unit comprises fluid tip, and this fluid tip is from the edge extract heat of the downstream position of conductor on the edge of of glass ribbon.
Among some embodiment of first aspect of the present invention, this method also comprises through at least one the step in system control heating unit and the refrigerating unit.
Among some embodiment of first aspect of the present invention, this method comprises that sensing temperature also uses the temperature that is sensed to provide and feeds back to system.
Second illustrative aspects of the present invention relates to the equipment of fusion draw glass ribbon, comprising: shaping voussoir, this shaping voussoir comprise a pair of downward-sloping profiled surface part, and this pair of angled surface portion is restrained to form root along downstream direction; The margin guide device, at least one profiled surface in this margin guide device and a pair of downward-sloping profiled surface part partly intersects; Heating unit, this heating unit are configured to the contact surface that contacts with the margin guide device of heating and melting glass; And refrigerating unit, this refrigerating unit is configured to the part extract heat that flows down from the margin guide device from glass ribbon.
Among some embodiment of second aspect of the present invention, this heating unit is configured to the contact surface that contacts with the margin guide device of melten glass is remained on the liquidus temperature top of melten glass.
Among some embodiment of second aspect of the present invention, this refrigerating unit is configured such that this refrigerating unit preferentially from the edge extract heat below root of glass ribbon, makes the temperature at edge of glass ribbon reduce with the speed higher than the temperature inside of glass ribbon.
Among some embodiment of second aspect of the present invention, it is many that this refrigerating unit is configured such that ratio of specific heat that this refrigerating unit is drawn from the edge below root of glass ribbon is provided to the heat of the contact surface that contacts with the margin guide device of melten glass by this heating unit.
Among some embodiment of second aspect of the present invention, this equipment also comprises thermoshield, and this thermoshield is positioned between the cooled region of heating region and refrigerating unit of heating unit.
Among some embodiment of second aspect of the present invention, this equipment also comprises system, and this system is configured to control at least one in heating unit and the refrigerating unit.
Among some embodiment of second aspect of the present invention, this system comprises unit and TP, and this TP is configured to provide and feeds back to this unit.
Among some embodiment of second aspect of the present invention, this system be configured to the controlled chilling device with preferentially from the edge extract heat below root of glass ribbon, make the temperature at edge of glass ribbon reduce with the speed higher than the temperature inside of glass ribbon.
Among some embodiment of second aspect of the present invention; This system is configured to operate at least one in heating unit and the refrigerating unit, makes ratio of specific heat that refrigerating unit draws from the edge below root of glass ribbon many to the heat that the contact surface that contacts with the margin guide device of melten glass applies by heating unit.
Description of drawings
When with reference to the following circumstantial letter of advantages, will be better appreciated by these and others, in the accompanying drawing:
Fig. 1 is the synoptic diagram of the equipment of fusion draw glass ribbon;
Fig. 2 is that the line 2-2 along Fig. 1 of equipment cuts open the three-dimensional cutaway view of getting, and Fig. 1 illustrates the each several part of first example apparatus;
Fig. 3 is the side-view that the part of second example apparatus is shown; And
Fig. 4 is the side-view that the part of the 3rd example apparatus is shown.
Embodiment
To each example more completely be described with reference to the accompanying drawing that each example embodiment is shown at present.Whenever and wherever possible, in institute's drawings attached, use identical Reference numeral to represent identical or similar part.But each side can be embodied as multiple multi-form, and should not be construed as and be limited to the embodiment that this paper sets forth.
Fig. 1 illustrates the synoptic diagram of the equipment 101 of fusion draw glass ribbon 103, and glass ribbon 103 is used for being processed into subsequently sheet glass.Equipment 101 can comprise melt container 105, and this melt container is configured to receive admixtion 107 from bin 109.Can be through introducing admixtion 107 as the admixtion delivery apparatus 111 of power with motor 113.Optional unit 115 can be configured to driven motor 113 so that the admixtion 107 of aequum is introduced melt container 105, and is indicated like arrow 117.Glass metal detector 119 can be used for measuring in the standpipe 123 melten glass 121 height location and through order wire 125 with the information communication that measures to unit 115.
Equipment 10 also can comprise the refining vessel 127 such as finer, and this refining vessel is positioned at the downstream of melt container 105, and is connected to melt container 105 through first pipe connecting 129.Mixing vessel 131 such as the teeter column also can be positioned at the downstream of refining vessel 127, and the transport box 133 such as alms bowl can be positioned at the downstream of mixing vessel 131.As shown in the figure, second pipe connecting 135 can be connected to mixing vessel 131 with refining vessel 127, and the 3rd pipe connecting 137 can be connected to transport box 133 with mixing vessel 131.Shown in further, overflow pipe 139 can be positioned to melten glass 121 is delivered to from transport box 133 import 141 of shaped container 143.As shown in the figure, melt container 105, refining vessel 127, mixing vessel 131, transport box 133 and shaped container 143 are can be along the example of the glass melting station of equipment 101 located in series.
To be equipment 101 cut open the three-dimensional cutaway view of getting along the hatching line 2-2 of Fig. 1 to Fig. 2.As shown in the figure, shaped container 143 comprises shaping voussoir 201, and this shaping voussoir comprises a pair of downward-sloping profiled surface part 207,209, and this extends between two opposite ends of shaping voussoir 201 downward-sloping profiled surface part.Should restrain to form root 213 along downstream direction 211 downward-sloping profiled surface part 207,209.Draw plane 215 and extend through root 213, wherein, can draw this glass ribbon 103 along downstream direction 211 along drawing plane 215.As shown in the figure, drawing plane 215 can divide root 213 equally, can be with respect to root 213 with other directed extension but should draw plane 215.
Shaped container 143 can comprise one or more margin guide devices, these one or more margin guide devices with should intersect in the downward-sloping profiled surface part 207,209 at least one.In another example, these one or more margin guide devices can all intersect with two downward-sloping profiled surface parts 207,209.In another example, the margin guide device can be positioned on the every end place in the opposite end of shaping voussoir 201, and wherein the edge of glass ribbon 103 is formed by the melten glass that flows down the margin guide device.For example, as shown in Figure 2, margin guide device 217 can be positioned on 203 places, first opposite end, locates and second identical margin guide device (not shown) can be positioned on second opposite end (not shown).Each margin guide device can be configured to all intersect with two downward-sloping profiled surface parts 207,209.Each margin guide device 217 can be mutually the same basically, but in other example, the margin guide device can take on a different character.According to each side of the present invention, can use the structure of various shaping voussoirs and margin guide device.For example; Each side of the present invention can be used with USP 3451798,3537834,7409839 and/or the shaping voussoir that in the U.S. Provisional Patent Application of submitting on February 26th, 2,009 61/155669, discloses and the structure of margin guide device, this with referring to mode introduce the full text of each patent or patented claim.
Fig. 2 only illustrates an example margin guide device 217, and this margin guide device can use with each side of the present invention.To the first margin guide device 217 be discussed based on following understanding: in some instances, the second margin guide device (not shown) can be similar or identical with the first margin guide device 217.Though provide identical margin guide device can help uniform glass ribbon is provided, the margin guide device can take on a different character, with sheet glass characteristic that change is provided and/or adapt to various shaped container structures.
Fig. 2 illustrates first downward-sloping profiled surface part 207 localized first sides with respect to shaping voussoir 201 of the first margin guide device 217.Though and not shown, yet the first margin guide device 217 also comprises second downward-sloping profiled surface part 209 localized second sides with respect to shaping voussoir 201.Second side of the first margin guide device 217 be first side about making the mirror image on the drawing plane 215 that root 213 splits.As shown in the figure, first side comprises first surface 219, and the first downward-sloping profiled surface part 207 of this first surface and shaping voussoir 201 intersects.Though also not shown, second side of the first margin guide device 217 also comprises substantially the same surface, and the second inclination shaping surface portion 207 of this surface and shaping voussoir 201 intersects.
Each opposite end of shaping voussoir 201 can be provided with maintainance block 221, and this maintainance block is designed to help the corresponding first and second margin guide devices 217 to carry out lateral register.Optional is that as shown in the figure, the first margin guide device 217 can comprise top 223 and bottom 225.In some instances, bottom 225 can make the first margin guide device 217 and the second margin guide device on second opposite end (not shown) on first opposed end 203 be connected.Margin guide device 217 linked together to be of value to simplify 217 the assemblings of margin guide device to shaping voussoir 201.In other example, the top 223 of margin guide device 217 can be divided and is arranged.For example, the first margin guide device 217 can separate with the second margin guide device, and can be assembled to each profiled surface part of downward-sloping profiled surface part 207,209 centerings of shaping voussoir 201 independently.Adopt some structure, provide banded top 223 not can simplify the manufacturing of margin guide device 217.Through with respect to shaping voussoir 201 different surfaces being provided, each margin guide device 217 can have a plurality of orientations and geometrical shape.
The equipment 101 of fusion draw glass ribbon also can comprise at least one edge roll assembly; This edge roll assembly comprises at least one pair of edge roll; Edge roll be configured to when glass ribbon when the root 213 of shaping voussoir 201 is pulled out, with the corresponding edge mate of glass ribbon.This is convenient to the edge of glass ribbon is carried out suitably precision work to edge roll.Edge roll precision work provides desirable local edge; And the edge section of melten glass is suitably fused, and pull out from two apparent surfaces that are associated with 207,209 pairs of downward-sloping profiled surface parts of margin guide device the edge section of this melten glass.As shown in Figure 2, the first edge roll assembly 227 is associated with the first margin guide device 217, and the second edge roll assembly (not shown) is associated with the second margin guide device.Each edge roll assembly 227 can be mutually the same basically, yet in more another example, this can have different characteristic to edge roll.
Fig. 2 illustrates the example edge roll assembly that can use with the each side that is disclosed.To describe the first edge roll assembly 227 based on following understanding: in some instances, the second edge roll assembly (not shown) can be similar or identical with the first edge roll assembly 227.As shown in Figure 2, the first edge roll assembly 227 comprises first pair of edge roll 229, and this comprises first edge roll 231 and second edge roll 233 to the edge roll assembly.Edge roll 231,233 is configured to cooperate with first side and second side of glass ribbon 103 simultaneously.The first edge roll assembly 227 also comprises first 235 of being attached to first edge roll 231 and is attached to second 237 of second edge roll 233.Be configured to for first and second 235,237 drive rotationally by motor (not shown).
Meaning property as shown in Figure 2 illustrates, and equipment 101 also can comprise one or more heating units 239.Heating unit 239 is configured to the contact surface that contacts with the first margin guide device 217 of heating and melting glass.In the example shown, first heating unit 239 can be used as the indirect heating device and is positioned near the margin guide device 217.In one example, the indirect heating device can be configured to heat the rear side of the bottom 225 of the first margin guide device 217.As shown in Figure 3, it is inner that heating unit 339 also can be positioned at the margin guide device, yet in other example, heating unit can be arranged on the margin guide device or other position.In fact, heating unit can be positioned at each three-dimensional position place with respect to margin guide device 217.As shown in the figure, single heating unit can be set, yet in other embodiments, a plurality of heating units can be set.
Heating unit can be heated to the contact surface that contacts with the first margin guide device 217 of melten glass the liquidus temperature top of melten glass.Liquidus temperature keeps fusion and does not have the low temperature range that crystallization generates corresponding to glass wherein.If partial melting glass drops to the liquidus temperature below, then can form crystallized glass.Crystallized glass part (being often referred to the crystallization in the melten glass) is tended to gather with the proportional speed of temperature contrast of glass liquidus temperature below.Thus, in one example, heating unit 239 is configured to the contact surface that contacts with the first margin guide device of heating and melting glass with the crystallization accumulation rate on the margin guide device that slows down.In another example, margin guide device 217 remain on liquidus temperature top with reduce basically or even any crystallization of eliminating on the margin guide device gather.The elimination that any crystallization gathers can cause no crystallization margin guide device equipment.
When the crystallization on expectation minimizing margin guide device gathered, the operation of heating unit 239 also tended to reduce the viscosity of melten glass.Pointed like Reference numeral among Fig. 2 245, the viscosity of reduction possibly desirably not reduce the width of glass ribbon 103.
Refrigerating unit can be configured to one or more different modes operations.For example, refrigerating unit 241 can be configured such that refrigerating unit 241 preferentially from the edge extract heat below root 213 of glass ribbon 103, makes the temperature at edge of glass ribbon 103 reduce with the speed higher than the temperature inside of glass ribbon.In this example, inside can comprise middle portion, such as the middle portion between the opposite side edge that is arranged on glass ribbon 103.Additionally or alternatively, can be configured such that ratio of specific heat that refrigerating unit 241 is drawn from the edge below root 213 of glass ribbon 103 is provided to the heat of the contact surface that contacts with the margin guide device of melten glass by heating unit 239 many for refrigerating unit 241.
Refrigerating unit 241 helps to offset the glass ribbon width of not expecting in the operation of root 213 lower position and reduces, and when isolated operation heating unit 239, the glass ribbon width may occur and reduce.Thus; The crystallization that heating unit 239 can be used for reducing on the margin guide device forms; Refrigerating unit 241 can be used for offsetting the loss of not expecting of glass ribbon width simultaneously; Otherwise during from melten glass that the margin guide device flows down, the loss of glass ribbon width may not appear with postcooling using heating unit 239.
As shown in Figure 3, the side-view of second example apparatus 301 of the shaping voussoir 201 that comprises Fig. 2 and margin guide device 217 is shown.In the example of Fig. 3, heating unit 339 is positioned at margin guide device 271.Further illustrate like Fig. 3, equipment 301 can comprise a pair of edge door 305 and a pair of central door 307.Only illustrate in this view in the edge door 305 one with central door 307 in one because other in every opposite house is positioned on the opposition side of melten glass.Edge door 305 guides flowing of melten glass with 225 belows, bottom that central door 307 is positioned at margin guide device 217 with help.Central door 307 comparable edge doors 305 are more closely closed, because the centre portions of melten glass is thinner than the edge section of melten glass.Because from the additional flow of the melten glass of margin guide device 217, edge door 305 can not closely be closed.
Further illustrate like Fig. 3, first and second rollers 231,233 can initiatively be cooled off to help reducing melten glass is deposited on the possibility on the edge roll 231,233.For example, as shown in Figure 3, get into pipeline 309 and be configured to extend through each axle 235, thereby be that first and second rollers 231,233 provide cooling fluid (being gas or liquid).Draw pipeline 311 and also extend through each axle 235,237, so that heated liquid is back to fluid supply 313.Hydro-pump 315 can be extracted fluid out from fluid supply; And make fluid pass through heat exchanger 317; To return the heat of removing before from 231,233 transmission of first and second rollers through getting into pipeline 309 circularly, so that first and second rollers 231,233 are cooled off constantly at fluid.Cooling can help to reduce the possibility that glass adheres to roller.In other example, can the higher rate cooled roller with radiator cooler 241.
Fig. 4 illustrates the 3rd example apparatus 401.As stated, the contact surface that contacts with the first margin guide device 217 of heating unit 239 heating and melting glass.Refrigerating unit 241 is configured to the part extract heat that flows down from the first margin guide device 217 from melten glass.The 3rd example apparatus 401 also can comprise the structure of cooled roller 231,233 or from any other structure of other example.
In the 3rd example of Fig. 4, be provided with optional thermoshield equipment, like shown thermoshield 411.If be provided with, then thermoshield can be configured to the heating region related with heating unit 239 from shielding with refrigerating unit 241 related cooled regions.As further illustrate, system 419 can be set control at least one in heating unit 239 and the refrigerating unit 241.System 419 can be operated at least one in heating unit 239 and the refrigerating unit 241 in many ways based on various states, includes but not limited to monitor the temperature of different positions place melten glass and the width of monitoring glass ribbon 103.In the example, system 419 can be configured to controlled chilling device 241 with preferentially from the edge extract heat below root 213 of glass ribbon 103, make the temperature at edge of glass ribbon 103 reduce with the speed higher than the temperature inside of glass ribbon 103.Additional or alternatively; System 419 can be configured to operate at least one in heating unit 239 and the refrigerating unit 241, makes ratio of specific heat that refrigerating unit 241 draws from the edge below root 213 of glass ribbon 103 many by the heat that the contact surface that contacts with the margin guide device of 239 pairs of melten glass of heating unit applies.
In the example, system 419 also can comprise unit 421 and at least one transmitter 423.In this example, this at least one transmitter 423 is positioned on the margin guide device 217, yet in other example, also possibly be other position.In addition, transmitter can comprise the infrared sensor that is positioned to the sensing state of temperature related with the margin guide device.This at least one transmitter 423 is configured to the sensing temperature related with melten glass around the margin guide device and uses institute's sensed temperature to heating unit 239 and refrigerating unit 241 feedback control to be provided.This at least one transmitter 423 can be with institute's sensed temperature through wired connection or through the wireless connections unit 421 of communicating by letter.Unit 421 is configured to adjust in response to the temperature that is sensed the operation of heating unit 239 and/or refrigerating unit 241 then.Additional or alternatively, another transmitter 425 can be related with refrigerating unit 241 comes the state of temperature at the edge of sensing glass ribbon 103.Transmitter can comprise infrared sensor, yet in other embodiments other sensing device can be set.Transmitter 425 is configured to the temperature that sensing is associated with the edge of glass ribbon 103 and uses the temperature that is sensed to provide feed back to unit 421.Based on the feedback that is sensed, unit 421 can be operated refrigerating unit 241 then suitable cooling conditions is provided.
In addition, unit can be along the line 417 send signals and controls the location of thermoshield 411 with driven motor (not shown), with provide the heating region related with heating unit and and the related cooled region of refrigerating unit 241 between desired thermal control.
To the method that be used to form glass be described with reference to the equipment 401 that comprises example margin guide device 217 now.
It should be understood that and in other example described in the whole application for example, to carry out similar or identical method steps.In addition, exemplary method of the present invention can omit and/or increase additional step.
In addition, only if point out, can be side by side, according to the order of sequence or carry out these steps with different order according to application-specific.
Shown in Fig. 1-2 and 4, utilization schematically is shown comprises that the example apparatus 401 of margin guide device 217 forms the method for glass.
In first exemplary method, provide a kind of fusion draw method to produce glass ribbon 103.This method comprises the step that melten glass is flow through comprise a pair of downward-sloping profiled surface part 207,209 of shaping voussoir 201, wherein, this to downward-sloping profiled surface part 207,209 in the at of shaping voussoir 201 in root 213 everywhere convergents.This method also comprises the steps: to make melten glass to flow through the first margin guide device 217 and draws melten glass forming glass ribbon 103 from the root 213 of shaping voussoir 201, and this first margin guide device 217 intersects in the inclination shaping surface portion 207,209 at least one with this.This method comprises that also the contact surface that contact with the first margin guide device 217 that uses heating unit 239 to come heating and melting glass and use refrigerating unit 241 come the part extract heat that flows down from margin guide device 217 from melten glass.Thus; The contact surface that contacts with the first margin guide device 217 of heating unit 239 heating and melting glass reduces crystallization and gathers, and refrigerating unit 241 from the position extract heat of margin guide device 217 belows with through offsetting because the width loss of only using heating unit 239 to occur keeps the width of glass ribbon 103.In the example, heating unit 239 comes the contact surface that contacts with the first margin guide device 217 of heating and melting glass through the external heater that uses conductor 217 outside operations on the edge of.In another example, heating unit 239 comes the contact surface that contacts with the first margin guide device 217 of heating and melting glass through using the interior heater of conductor 217 internal operations on the edge of.In the example, refrigerating unit 241 can come from the melten glass extract heat of margin guide device 217 belows through using fluid tip.
This exemplary method can comprise that use heating unit 239 is heated to the contact surface that contacts with the first margin guide device 217 of melten glass the liquidus temperature top of melten glass.This liquidus temperature can be corresponding to the situation that begins to produce crystallization phases.Thus, in one example, heating unit 239 is configured to the contact surface that contacts with the first margin guide device 217 of heating and melting glass with the crystallization accumulation rate on the margin guide device 217 that slows down.In another example, margin guide device 217 remain on liquidus temperature top with reduce in fact or even any crystallization of eliminating on the margin guide device 217 gather.Eliminating crystallization fully, to gather desired additional heat flux be to guarantee not have margin guide device 217 surface portions below the liquidus temperature that glass forms, to move.Therefore, each side of the present invention can reduce or eliminate the crystallization that possibly influence the glass ribbon quality and gathers.In fact, when the crystallization layer becomes too thick, mobile glass maybe " bridge joint " to very near fixed object and cause serious operation problem.Crystallization gathers the fusion that also can interrupt two molten glass passings from downward-sloping profiled surface 207,209 drawings from root 213.The fusion of locating is on the edge of interrupted causing and in crimping, is formed bubble or in glass ribbon, form other defective.
This exemplary method can comprise and uses refrigerating unit 241 to draw the use that a certain amount of heat flux is offset heating unit 239.Use heating unit 239 to come the step of the contact surface that contacts with the first margin guide device 217 of heating and melting glass will cause the width loss or the contraction of the glass ribbon 103 that is obtained.Can move refrigerating unit 241 draws the heat flux amount of the amount that corresponds to the heat flux that is applied by heating unit 239 and recovers width loss part.In the example, the amount of the heat flux that will apply and drawn then can form model through glass ribbon and estimate.Glass ribbon forms the guidance that model can provide the glass sheet size that is obtained for various melten glass temperature.
In another example, can in the operational process of equipment, measure that applied and the amount heat flux of being drawn.In the example, refrigerating unit 241 can different rate of cooling moves the different in width loss of the different drawing-downs that take place from melten glass that obtain glass ribbon.Based on modelling technique, confirmed to cause the glass ribbon that is obtained to reduce to the width loss of about 57mm with different rates operation refrigerating unit 241.Use in the alternate model example of high relatively rate of cooling, the width loss of the glass ribbon of having confirmed to be obtained can reduce to about 6mm.Use in the another model example of big relatively rate of cooling, the result of this model shows that glass ribbon has the width increase of about 11mm.
This exemplary method also can further comprise the temperature at the melten glass of root 213 lower position is remained on below the sagging warpage temperature of melten glass.Sagging warpage thermometer is shown in observes before the sagging warpage admissible maximum temperature on the free glass ribbon.Sagging warpage temperature can change according to the cooling curve in the melten glass zone and local mass flow and glass ingredient.The physical interpretation of sagging warpage is the melten glass state that when the temperature of melten glass surpasses sagging warpage temperature, has the viscosity of reduction wherein.Under sagging warpage state, the viscosity of melten glass is reduced to it can not be stowed the further dilatory point of roller (not shown) again.In addition, under sagging warpage state, the dilatory roller that the glass flows of leaving the shaping voussoir can begin to carry out through being arranged in much lower plane is dragged to fixed thickness from pure rectangular plate.In an exemplary method, heating unit 239 edge's temperature of the melten glass of conductor 217 top processes on the edge of is maintained at about 3010 ° of C to about 1200 ° of C scopes.This TR can be corresponding to the liquidus temperature top that will remain on melten glass with the melten glass that the first margin guide device contacts; Such as 3010 ° of C; And will still remain on below the sagging warpage temperature, in the temperature of the melten glass of root lower position simultaneously such as 1200 ° of C.This exemplary method can be through one in use heating unit 239 and the refrigerating unit 241 or through using heating unit 239 and refrigerating unit 241 to keep temperature simultaneously.
During another substituted, this exemplary method also can further comprise the step that the cooled region with the heating region of heating unit 239 and refrigerating unit 241 shields.Heating region is shielded and can realize through the thermoshield shown in Fig. 4 411 from cooled region.Thermoshield 411 can be configured to help to control heat passage between heating region and the cooled region.
This exemplary method also can further comprise through at least one the step in system 419 control heating units 239 and the refrigerating unit 241.System 419 can be operated at least one in heating unit 239 and the refrigerating unit 241 in many ways based on various conditions, comprises the temperature of different positions place melten glass and the width of glass ribbon 103.In the example, system 419 can comprise the temperature that sensing or measurement are relevant with melten glass and use institute's sensed temperature to come to provide as system 419 step of feedback control.
It will be apparent for a person skilled in the art that and to make various modifications and variation and without departing from the spirit and scope of the present invention.
Claims (20)
1. fusion draw method may further comprise the steps:
Melten glass is flowed on a pair of downward-sloping profiled surface part of shaping voussoir, and said downward-sloping profiled surface part is along restraining along downstream direction to form root;
Make melten glass with said a pair of downward-sloping profiled surface part in the margin guide device that partly intersects of at least one profiled surface on flow;
From said root drawing glassribbons, wherein, the edge of glass ribbon is formed by the melten glass that flows down from said margin guide device;
Use heating unit to come the contact surface that contacts with said margin guide device of heating and melting glass; And
Use refrigerating unit to come the part extract heat that flows down from said margin guide device from glass ribbon.
2. the method for claim 1 is characterized in that, said heating unit remains on the contact surface that contacts with said margin guide device of melten glass the liquidus temperature top of melten glass.
3. according to claim 1 or claim 2 method is characterized in that, also comprises the temperature at the melten glass of root downstream position is remained on the step below the sagging warpage temperature of melten glass.
4. each described method as in the aforementioned claim is characterized in that said refrigerating unit is preferentially from the edge extract heat below root of glass ribbon, makes the temperature at edge of glass ribbon reduce with the speed higher than the temperature inside of glass ribbon.
5. each described method as in the aforementioned claim is characterized in that: the ratio of specific heat that said refrigerating unit is drawn from the edge below root of glass ribbon is provided to melten glass by said heating unit the heat of the contact surface that contacts with said margin guide device is many.
6. each described method as in the aforementioned claim is characterized in that: also comprise the step that the cooled region with the heating region of said heating unit and said refrigerating unit shields.
7. like each described method in the aforementioned claim, it is characterized in that: through using the external heater in the outside operation of said margin guide device, said heating unit keeps the contact surface that contacts with said margin guide device of melten glass.
8. like each described method in the aforementioned claim, it is characterized in that: through using the interior heater at said margin guide device internal operation, said heating unit keeps the contact surface that contacts with said margin guide device of melten glass.
9. like each described method in the aforementioned claim, it is characterized in that: said refrigerating unit comprises fluid tip, and said fluid tip is from the edge extract heat in said margin guide device downstream position of glass ribbon.
10. each described method as in the aforementioned claim is characterized in that: also comprise through at least one the step in system control heating unit and the refrigerating unit.
11. method as claimed in claim 10 also comprises sensing temperature and uses the temperature that is sensed to provide feeding back to said system.
12. an equipment that is used for the fusion draw glass ribbon comprises:
Shaping voussoir, said shaping voussoir comprise a pair of downward-sloping profiled surface part, and said pair of angled surface portion is restrained to form root along downstream direction;
The margin guide device, at least one profiled surface in said margin guide device and a pair of downward-sloping profiled surface part partly intersects;
Heating unit, said heating unit are configured to the contact surface that contacts with said margin guide device of heating and melting glass; And
Refrigerating unit, said refrigerating unit are configured to the part extract heat that flows down from said margin guide device from glass ribbon.
13. equipment as claimed in claim 12 is characterized in that, said heating unit is configured to the contact surface that contacts with said margin guide device of melten glass is remained on the liquidus temperature top of melten glass.
14. like claim 12 or 13 described equipment; It is characterized in that; Said refrigerating unit is configured such that said refrigerating unit preferentially from the edge extract heat below root of glass ribbon, makes the temperature at edge of glass ribbon reduce with the speed higher than the temperature inside of glass ribbon.
15. like each described equipment in the claim 12 to 14; It is characterized in that it is many that said refrigerating unit is configured such that ratio of specific heat that said refrigerating unit is drawn from the edge below root of glass ribbon is provided to the heat of the contact surface that contacts with said margin guide device of melten glass by said heating unit.
16., it is characterized in that like each described equipment in the claim 12 to 15, also comprise thermoshield, said thermoshield is positioned between the cooled region of heating region and said refrigerating unit of said heating unit.
17. like each described equipment in the claim 12 to 16, it is characterized in that, also comprise:
System, said system are configured to control at least one in said heating unit and the said refrigerating unit.
18. equipment as claimed in claim 17 is characterized in that, said system comprises unit and TP, and said TP is configured to provide and feeds back to said unit.
19. like claim 17 or 18 described equipment; It is characterized in that; Said system be configured to control said refrigerating unit with preferentially from the edge extract heat below root of glass ribbon, make the temperature at edge of glass ribbon reduce with the speed higher than the temperature inside of glass ribbon.
20. like each described equipment in the claim 17 to 19; It is characterized in that; Said system is configured to operate at least one in said heating unit and the said refrigerating unit, makes ratio of specific heat that said refrigerating unit draws from the edge below root of glass ribbon many to the heat that the contact surface that contacts with said margin guide device of melten glass applies by said heating unit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29624010P | 2010-01-19 | 2010-01-19 | |
| US61/296,240 | 2010-01-19 | ||
| PCT/US2011/021255 WO2011090893A1 (en) | 2010-01-19 | 2011-01-14 | Apparatus and methods for fusion drawing a glass ribbon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102762507A true CN102762507A (en) | 2012-10-31 |
| CN102762507B CN102762507B (en) | 2016-08-03 |
Family
ID=43708842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180006544.3A Expired - Fee Related CN102762507B (en) | 2010-01-19 | 2011-01-14 | The equipment of fusion drawn glass band and method |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5820395B2 (en) |
| KR (1) | KR101796804B1 (en) |
| CN (1) | CN102762507B (en) |
| TW (1) | TWI540107B (en) |
| WO (1) | WO2011090893A1 (en) |
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| CN105050969A (en) * | 2012-12-21 | 2015-11-11 | 康宁股份有限公司 | Method and apparatus for minimizing devitrification on edge directors with induction heating |
| CN106536429A (en) * | 2014-05-15 | 2017-03-22 | 康宁股份有限公司 | Methods and apparatuses for reducing heat loss from edge directors |
| CN108367959A (en) * | 2015-11-19 | 2018-08-03 | 康宁股份有限公司 | Glass manufacturing equipment with cooling device and its application method |
| CN109071299A (en) * | 2016-04-19 | 2018-12-21 | 康宁股份有限公司 | For manufacturing the Muffle furnace, glass forming apparatus and method of glass tape |
| CN110114319A (en) * | 2016-12-21 | 2019-08-09 | 康宁股份有限公司 | For managing the cooling method and apparatus of glass tape |
| CN110650925A (en) * | 2017-04-24 | 2020-01-03 | 康宁股份有限公司 | Fusion draw apparatus and method of making a glass ribbon |
| CN115697922A (en) * | 2020-06-18 | 2023-02-03 | 日本电气硝子株式会社 | Glass article manufacturing apparatus and manufacturing method thereof |
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| JP5724552B2 (en) * | 2011-04-01 | 2015-05-27 | 日本電気硝子株式会社 | Thin glass manufacturing equipment |
| US9919944B2 (en) | 2014-08-15 | 2018-03-20 | Corning Incorporated | Apparatus and methods for manufacturing glass |
| JP6352755B2 (en) * | 2014-09-30 | 2018-07-04 | ＡｖａｎＳｔｒａｔｅ株式会社 | Glass substrate manufacturing method and glass substrate manufacturing apparatus |
| JP6429185B2 (en) * | 2014-10-31 | 2018-11-28 | ＡｖａｎＳｔｒａｔｅ株式会社 | Glass plate manufacturing method and glass plate manufacturing apparatus |
| TWI750256B (en) * | 2016-11-22 | 2021-12-21 | 美商康寧公司 | Forming bodies for forming continuous glass ribbons and glass forming apparatuses comprising the same |
| US11440830B2 (en) | 2017-04-28 | 2022-09-13 | Corning Incorporated | Edge directors including an interior heating device |
| CN112912349A (en) * | 2018-10-05 | 2021-06-04 | 康宁公司 | Glass forming apparatus having injection and extraction ports and method of cooling glass using the same |
| DE102019120064A1 (en) * | 2019-07-24 | 2021-01-28 | Schott Ag | Device and method for producing glass ribbons |
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| CN105050969A (en) * | 2012-12-21 | 2015-11-11 | 康宁股份有限公司 | Method and apparatus for minimizing devitrification on edge directors with induction heating |
| CN105050969B (en) * | 2012-12-21 | 2018-11-09 | 康宁股份有限公司 | With sensing heating so that the method and apparatus that the devitrification on edge guide member minimizes |
| CN106536429A (en) * | 2014-05-15 | 2017-03-22 | 康宁股份有限公司 | Methods and apparatuses for reducing heat loss from edge directors |
| CN115286218A (en) * | 2014-05-15 | 2022-11-04 | 康宁股份有限公司 | Apparatus for manufacturing glass ribbon |
| CN108367959A (en) * | 2015-11-19 | 2018-08-03 | 康宁股份有限公司 | Glass manufacturing equipment with cooling device and its application method |
| CN109071299A (en) * | 2016-04-19 | 2018-12-21 | 康宁股份有限公司 | For manufacturing the Muffle furnace, glass forming apparatus and method of glass tape |
| US11649184B2 (en) | 2016-04-19 | 2023-05-16 | Corning Incorporated | Glass forming apparatuses and methods for making glass ribbons |
| CN109071299B (en) * | 2016-04-19 | 2022-05-31 | 康宁股份有限公司 | Muffle furnace, glass forming apparatus and method for manufacturing glass ribbon |
| US11427493B2 (en) | 2016-12-21 | 2022-08-30 | Corning Incorporated | Method and apparatus for managing glass ribbon cooling |
| CN110114319B (en) * | 2016-12-21 | 2022-06-10 | 康宁股份有限公司 | Method and apparatus for managing cooling of a glass ribbon |
| CN110114319A (en) * | 2016-12-21 | 2019-08-09 | 康宁股份有限公司 | For managing the cooling method and apparatus of glass tape |
| CN110650925A (en) * | 2017-04-24 | 2020-01-03 | 康宁股份有限公司 | Fusion draw apparatus and method of making a glass ribbon |
| US11554975B2 (en) | 2017-04-24 | 2023-01-17 | Corning Incorporated | Fusion draw apparatus and methods of making a glass ribbon |
| CN115697922A (en) * | 2020-06-18 | 2023-02-03 | 日本电气硝子株式会社 | Glass article manufacturing apparatus and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20120121897A (en) | 2012-11-06 |
| JP5820395B2 (en) | 2015-11-24 |
| CN102762507B (en) | 2016-08-03 |
| JP2013517217A (en) | 2013-05-16 |
| TWI540107B (en) | 2016-07-01 |
| TW201129511A (en) | 2011-09-01 |
| WO2011090893A1 (en) | 2011-07-28 |
| KR101796804B1 (en) | 2017-11-10 |
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